class_docstr: Abstract base class for deterministic models.
  
  :meta private:
docstr: Compatibilizes the `DeterministicModel` with `EnsemblePosterior`
docstr_tok: ["Compatibilizes","the","`","DeterministicModel","`","with","`","EnsemblePosterior","`"]
code: def _forward(self, X: Tensor) -> Tensor:
      r"""Compatibilizes the `DeterministicModel` with `EnsemblePosterior`"""
      return self.forward(X=X).unsqueeze(-3)
  
imports: from __future__ import annotations
  from abc import abstractmethod
  from typing import Callable, List, Optional, Union
  import torch
  from botorch.models.ensemble import EnsembleModel
  from botorch.models.model import Model
  from torch import Tensor
label_desc: Use image node_id 2 for calling the DeterministicModel obj's underlying member method code with example usage: obj._forward(X) and returns: self